CN109076048B - Signal transmission method, sending end and receiving end - Google Patents

Signal transmission method, sending end and receiving end Download PDF

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CN109076048B
CN109076048B CN201680085597.1A CN201680085597A CN109076048B CN 109076048 B CN109076048 B CN 109076048B CN 201680085597 A CN201680085597 A CN 201680085597A CN 109076048 B CN109076048 B CN 109076048B
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sequence
cyclic shift
subcarriers
parameter information
signaling
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CN109076048A (en
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曲秉玉
贺传峰
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Huawei Technologies Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2626Arrangements specific to the transmitter only
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • H04L27/2605Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H04L27/2607Cyclic extensions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2614Peak power aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2614Peak power aspects
    • H04L27/2615Reduction thereof using coding
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver

Abstract

The application discloses a method for transmitting signals, which comprises the steps of respectively mapping a first sequence comprising M elements and a second sequence comprising M elements onto M subcarriers distributed at equal intervals, wherein the M subcarriers are subcarriers on the same time domain symbol, the first sequence and the second sequence are orthogonal in code division, and a first sequence a is orthogonal0,a1,...,aM‑1Is composed of a third sequence c with length K0,c1,...,cK‑1Extended, the second sequence b0,b1,...,bM‑1Is composed of a fourth sequence d of length K0,d1,...,dK‑1Expanded, M ═ p × K,
Figure DDA0001860703910000011
Figure DDA0001860703910000012
i is a variable, i takes a value of 0,1,., M-1, u and v are respectively one of 0,1,.., p-1, and v is not equal to u; generating a transmission signal according to the elements on the M subcarriers; the transmission signal is transmitted. The signal transmission method constructs two orthogonal code division sequences through periodic repetition and phase rotation, so that when at least two paths of signals are transmitted in one time domain symbol, the PAPR of signal transmission can be ensured to be low.

Description

Signal transmission method, sending end and receiving end
Technical Field
The present application relates to the field of communications, and more particularly, to a method, a transmitting end, and a receiving end for transmitting a signal.
Background
Orthogonal Frequency Division Multiplexing (OFDM) technology is widely used in downlink signal transmission in LTE systems due to its characteristics of strong multipath interference resistance, simple implementation of discrete fourier transform, and contribution to multi-antenna transmission technology.
Because the OFDM technology is based on a multi-carrier system, the Peak-to-average Power Ratio (PAPR) is high, and the requirement for the linear Power amplifier of the transmitter is high. Because the requirement of the base station side on cost control is not high, a transmitter with good power amplifier linearity can be used, and the downlink transmission generally adopts the OFDM technology. The UE has limited transmission power and is sensitive to cost, and needs to reduce the requirement for power amplification of the transmitter, and the coverage distance needs to satisfy a certain requirement, so uplink transmission usually employs a Single Carrier-Frequency division multiple Access (SC-FDMA) technique. Compared with the OFDM technology, the SC-FDMA technology has lower PAPR, can reduce the requirement on the power amplifier of a transmitter and improve the utilization rate of power.
The SC-FDMA scheme adopted by the LTE system at present is a discrete fourier Transform Spread orthogonal frequency division multiplexing (DFT-S-OFDM) technique. The DFT-S-OFDM technology can realize the peak PAPR performance similar to that of a single carrier signal, and the low PAPR can reduce the complexity and cost of hardware implementation. When the sub-carrier groups occupied by different users are not overlapped, the DFT-S-OFDM can realize the orthogonal frequency division multiple access, thereby obtaining a single carrier orthogonal frequency division multiple access scheme, and therefore, the DFT-S-OFDM technology is particularly suitable for the uplink transmission of a mobile communication system.
In the DFT-S-OFDM technology, an uplink data Signal and an uplink Reference Signal (e.g., a Demodulation Reference Signal (DMRS)) are transmitted in a time division multiplexing manner in order to maintain PAPR performance close to that of a single carrier Signal for transmission of a plurality of signals or channels of one UE.
On the other hand, the LTE Release14 (Release14, R14) standard will introduce a short TTI feature, where the TTI can be one symbol at the shortest. With short TTI characteristics, one symbol may need to carry both reference and data signals.
For example, one uplink symbol simultaneously carries a DMRS and a Physical Uplink Control Channel (PUCCH), and the DMRS and the PUCCH satisfy mutual orthogonality by code division multiplexing. In the frequency domain, the DMRS and the PUCCH are mapped to the same group of subcarriers using different phases of one base sequence (base sequence), respectively, and the different phases of the base sequence satisfy mutual orthogonality. It should be noted that different phases of a base sequence in the frequency domain correspond to different cyclic shifts of the base sequence in the time domain sequence. Different phases of the base sequence in the frequency domain satisfy orthogonality, and different cyclic shifts thereof in the time domain also satisfy orthogonality. Herein, the expression of one base sequence in the frequency domain is referred to as a frequency-domain base sequence, and the expression in the time domain is referred to as a time-domain base sequence.
Specifically, assuming that a signal code-division multiplexed by a DMRS and a PUCCH is transmitted on one symbol, and an occupied frequency domain Resource is one Resource Block (RB), the length of the base sequence is 12, the DMRS and the PUCCH use two different phases of the base sequence, and the frequency domain signal after code-division multiplexing is represented as:
Figure GPA0000252632840000041
rx(n) for Quadrature Phase Shift Keying (QPSK) modulationBase sequence of length 12, α1And α2Selected from 12 phases, α12Not equal to 0. d (m) is a symbol after QPSK modulation is carried out on 2bits information carried by the PUCCH transmitted on the symbol.
In the above example, since the signal transmitted on one symbol is a signal obtained by superimposing a plurality of phase-rotated sequences of one base sequence, and the composite signal s (n) is no longer an SC-FDMA signal, the PAPR increases compared to the SC-FDMA signal, which causes a decrease in power utilization, and affects the uplink performance.
Disclosure of Invention
The application provides a method for transmitting signals, a transmitting end and a receiving end, so that when at least two paths of signals are transmitted in one symbol, the transmission signals can be ensured to have low PAPR.
A first aspect provides a method of transmitting a signal, comprising: the sender will include a first sequence a of M elements0,a1,...,aM-1Mapping to M subcarriers distributed at equal intervals and a second sequence b comprising M elements0,b1,...,bM-1Mapping to the M subcarriers, where the M subcarriers are subcarriers on the same time domain symbol, the first sequence and the second sequence are orthogonal in code division, and the first sequence a0,a1,...,aM-1Is composed of a third sequence c with length K0,c1,...,cK-1Extended, the second sequence b0,b1,...,bM-1Is composed of a fourth sequence d of length K0,d1,...,dK-1Expanded, M ═ p × K,
Figure GPA0000252632840000051
i is a variable, i takes a value of 0,1,., M-1, u and v are respectively one of 0,1,., p-1, and v is not equal to u, wherein M, p and K are positive integers; the sending end generates sending signals according to the elements on the M subcarriers; and the sending end sends the sending signal.
The method for transmitting signals provided by the first aspect constructs two code division orthogonal sequences by periodic repetition and phase rotation, so that when at least two paths of signals are transmitted in one symbol, the PAPR of signal transmission can be ensured to be lower, and meanwhile, the utilization rate of code resources is not reduced, thereby improving the performance of an uplink.
In a possible implementation manner of the first aspect, the third sequence c0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Can be the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure GPA0000252632840000052
r is variable and the value of r is 0,11And α2Is any real number.
In one possible implementation of the first aspect, α1And α2Can be
Figure GPA0000252632840000053
Figure GPA0000252632840000054
Wherein λ is1And λ2Each is any one of 0, 1.. and pK-1.
In a possible implementation manner of the first aspect, the method further includes the step that the sending end sends a first signaling, where the first signaling includes first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and α1The sending end sends a second signaling, the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is related to v and α2And (4) correlating.
In a possible implementation manner of the first aspect, the third sequence c0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure GPA0000252632840000055
r is variable and the value of r is 0,11And β2One value of 0,1, K-1, respectively.
Two sequences, namely a third sequence and a fourth sequence, can be obtained by carrying out cyclic shift on the base sequence, and then the third sequence and the fourth sequence are periodically repeated and phase-rotated to construct two sequences with orthogonal code division.
In a possible implementation manner of the first aspect, the method further includes the step that the sending end sends a first signaling, where the first signaling includes first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and β1The sending end sends a second signaling, the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is related to v and β2And (4) correlating.
In this implementation, since two signals are simultaneously transmitted on M subcarriers of the same time domain symbol, the transmitting end needs to notify the receiving end of cyclic shift of the two signals, so as to facilitate decoding by the receiving end.
In a possible implementation manner of the first aspect, the generating, by the transmitter, a transmission signal according to the elements on the M subcarriers includes: and the sending end bears the information to be transmitted on the M subcarriers, and elements which bear the information to be transmitted on the M subcarriers are converted to a time domain to generate a sending signal.
A second aspect provides a method of transmitting a signal, comprising: a receiving end receives signals on M subcarriers distributed at equal intervals, wherein the M subcarriers are subcarriers on the same time domain symbol; the receiving end carries out Fast Fourier Transform (FFT) on the signal to obtain a first sequence a0,a1,...,aM-1Corresponding first received signal and second sequence b0,b1,...,bM-1A corresponding second received signal, wherein the first sequence and the second sequence are code division orthogonal, and the first sequence a0,a1,...,aM-1Is composed of a third sequence c with length K0,c1,...,cK-1Extended, the second sequence b0,b1,...,bM-1Is composed of a fourth sequence d of length K0,d1,...,dK-1Expanded, M ═ p × K,
Figure GPA0000252632840000061
i is a variable, i takes a value of 0,1,., M-1, u and v are respectively one of 0,1,., p-1, and v is not equal to u, wherein M, p and K are positive integers; and the receiving end processes the first receiving signal and the second receiving signal.
In a possible implementation manner of the second aspect, the third sequence c0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure GPA0000252632840000071
r is variable and the value of r is 0,11And α2Is any real number.
In one possible implementation of the second aspect,
Figure GPA0000252632840000072
wherein λ is1And λ2Each is any one of 0, 1.. and pK-1.
In one possible implementation manner of the second aspect, the method further includes: the receiving end receives a first signaling, the first signaling includes first cyclic shift parameter information of the first sequence, and the first signaling is transmitted to the receiving endCyclic shift parameter information with u and α1Receiving a second signaling by the receiving end, wherein the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is related to v and α2And (4) correlating.
In a possible implementation manner of the second aspect, the third sequence c0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure GPA0000252632840000073
r is variable and the value of r is 0,11And β2One value of 0,1, K-1, respectively.
In a possible implementation manner of the second aspect, a receiving end receives a cyclic shift parameter, and the method further includes that the receiving end receives a first signaling, where the first signaling includes first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and β1Receiving a second signaling by the receiving end, wherein the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is related to v and β2And (4) correlating.
In a third aspect, a method for transmitting signals is provided, including: a sending end maps a first sequence comprising M elements to M subcarriers distributed at equal intervals, and maps a second sequence comprising M elements to the M subcarriers, wherein the first sequence is a Fourier transform sequence of a fifth sequence, the second sequence is a Fourier transform sequence of a sixth sequence, the fifth sequence and the sixth sequence respectively comprise M elements, the elements of the fifth sequence and the sixth sequence at the same position are not zero elements at the same time, the fifth sequence and the sixth sequence are orthogonal in code division, and M is a positive integer; the sending end generates sending signals according to the elements on the M subcarriers; and the sending end sends the sending signal.
The method for transmitting signals provided by the third aspect constructs two sequences which are orthogonal in terms of code division on a time domain, and elements of the two sequences at the same position are not zero elements at the same time, so that when at least two paths of signals are transmitted in one symbol, the PAPR of signal transmission can be ensured to be low, and the utilization rate of code resources is not reduced, thereby improving the performance of an uplink.
In a possible implementation manner of the third aspect, the fifth sequence is extended by a seventh sequence, the sixth sequence is extended by an eighth sequence, and the seventh sequence and the eighth sequence are orthogonal by code division.
The seventh sequence and the eighth sequence for obtaining code division orthogonality may be obtained as follows, where the seventh sequence and the eighth sequence are sequences obtained by performing different cyclic shifts on the same base sequence.
In a specific example, the first sequence and the second sequence may be obtained by: the first sequence is a0,a1,...,aM-1The frequency domain sequence corresponding to the seventh sequence is a third sequence c with the length of K0,c1,...,cK-1The first sequence is expanded from the third sequence, and the second sequence is b0,b1,...,bM-1The frequency domain sequence corresponding to the eighth sequence is a fourth sequence d with the length of K0,d1,...,dK-1The second sequence is augmented by the fourth sequence, wherein M ═ p × K,
Figure GPA0000252632840000081
i is a variable, i takes a value of 0,1,., M-1, u and v are each one of 0,1,. and p-1, and v is not equal to u, wherein p and K are both positive integers.
In this possible implementation, the seventh sequence corresponding to the fifth sequence and the eighth sequence corresponding to the sixth sequence are time division multiplexed, so that after the two sequences are subjected to subsequent signal processing, the transmitted signal still has a low PAPR.
In a possible implementation manner of the third aspect, before the mapping the first sequence including M elements onto M subcarriers distributed at equal intervals, the method further includes: the sending end carries out first transformation on the fifth sequence to obtain the first sequence, wherein the first transformation is Discrete Fourier Transform (DFT) of M multiplied by M; and/or prior to said mapping the second sequence comprising M elements onto M subcarriers, the method further comprises: and the sending end carries out second transformation on the sixth sequence to obtain the second sequence, wherein the second transformation is an M × M DFT.
In a possible implementation manner of the third aspect, the mapping the first sequence including M elements onto the M subcarriers includes: determining the fifth sequence, the fifth sequence f0,f1,...,fM-1Is composed of said seventh sequence h of length K0,h1,...,hK-1Expanded by the seventh sequence h0,h1,...,hK-1In the fifth sequence f0,f1,...,fM-1A medium spacing distribution with p, M ═ p × K, and the fifth sequence f0,f1,...,fM-1Except the K elements h of the seventh sequence0,h1,...,hK-1The other elements are zero elements; performing M × M DFT on the fifth sequence, and mapping the fifth sequence to the M subcarriers; the mapping the second sequence including M elements onto the M subcarriers includes: determining the sixth sequence, the sixth sequence g0,g1,...,gM-1Is formed by said eighth sequence j of length K0,j1,...,jK-1Expanded by the eighth sequence j0,j1,...,jK-1In the sixth sequence g0,g1,...,gM-1A medium spacing distribution with p, M ═ p × K, and the sixth sequence g0,g1,...,gM-1In the process of removingK elements j of an eighth sequence0,j1,...,jK-1The other elements are zero elements; and performing M × M DFT on the sixth sequence, and mapping the sixth sequence to the M subcarriers.
In a possible implementation manner of the third aspect, the method further includes: the sending end maps a ninth sequence comprising M elements onto the M subcarriers, wherein the ninth sequence is a Fourier transform sequence of a tenth sequence, elements of any two time domain sequences in the tenth sequence, the fifth sequence and the sixth sequence at the same position are not zero elements at the same time, and any two time domain sequences in the fifth sequence, the sixth sequence and the tenth sequence are orthogonal in code division.
In a fourth aspect, a method of transmitting a signal is provided, comprising: a receiving end receives signals on M subcarriers distributed at equal intervals, wherein the M subcarriers are subcarriers on the same time domain symbol; the receiving end carries out Fast Fourier Transform (FFT) on the signal to obtain a first receiving signal corresponding to a first sequence and a second receiving signal corresponding to a second sequence, the first sequence is a Fourier transform sequence of a fifth sequence, the second sequence is a Fourier transform sequence of a sixth sequence, the fifth sequence and the sixth sequence respectively comprise M elements, the elements of the fifth sequence and the sixth sequence at the same position are not zero elements at the same time, the fifth sequence and the sixth sequence are orthogonal in code division, wherein M is a positive integer; and the receiving end processes the first receiving signal and the second receiving signal.
In a possible implementation manner of the fourth aspect, the fifth sequence is extended by a seventh sequence, the sixth sequence is extended by an eighth sequence, and the seventh sequence and the eighth sequence are orthogonal by code division.
In a possible implementation manner of the fourth aspect, the seventh sequence and the eighth sequence are sequences obtained by performing different cyclic shifts on the same base sequence.
One possibility in the fourth aspectIn an implementation manner of (1), the first sequence is a0,a1,...,aM-1The frequency domain sequence corresponding to the seventh sequence is a third sequence c with the length of K0,c1,...,cK-1The first sequence is expanded from the third sequence, and the second sequence is b0,b1,...,bM-1The frequency domain sequence corresponding to the eighth sequence is a fourth sequence d with the length of K0,d1,...,dK-1The second sequence is augmented by the fourth sequence, wherein M ═ p × K,
Figure GPA0000252632840000101
Figure GPA0000252632840000102
i is a variable, i takes a value of 0,1,., M-1, u and v are each one of 0,1,. and p-1, and v is not equal to u, wherein p and K are both positive integers.
In a possible implementation manner of the fourth aspect, the fifth sequence f0,f1,...,fM-1Is composed of said seventh sequence h of length K0,h1,...,hK-1Expanded by the seventh sequence h0,h1,...,hK-1In the fifth sequence f0,f1,...,fM-1A medium spacing distribution with p, M ═ p × K, and the fifth sequence f0,f1,...,fM-1Except the K elements h of the seventh sequence0,h1,...,hK-1The other elements are zero elements; the sixth sequence g0,g1,...,gM-1Is formed by said eighth sequence j of length K0,j1,...,jK-1Expanded by the eighth sequence j0,j1,...,jK-1In the sixth sequence g0,g1,...,gM-1A medium spacing distribution with p, M ═ p × K, and the sixth sequence g0,g1,...,gM-1Dividing K elements j of the eighth sequence0,j1,...,jK-1The other elements than zero elements.
In one possible implementation manner of the fourth aspect, the method further includes: the receiving end performs Fast Fourier Transform (FFT) on the signal, and further obtains a third received signal corresponding to a ninth sequence, wherein the ninth sequence is a Fourier transform sequence of a tenth sequence, elements of any two time domain sequences in the tenth sequence, the fifth sequence and the sixth sequence at the same position are not zero elements at the same time, and any two time domain sequences in the fifth sequence, the sixth sequence and the tenth sequence are orthogonal in code division; and the receiving end processes the third received signal.
In a possible implementation manner of the fourth aspect, the processing, by the receiving end, the first received signal and the second received signal, includes: the receiving end carries out Inverse Discrete Fourier Transform (IDFT) on the first receiving signal to obtain a fifth sequence corresponding to the first sequence; and/or the receiving end carries out Inverse Discrete Fourier Transform (IDFT) on the second receiving signal to obtain a sixth sequence corresponding to the second sequence.
In a fifth aspect, a sending end is provided, which includes a processing module and a sending module, and is configured to execute the first aspect and its corresponding implementation manner.
A sixth aspect provides a transmitting end, which includes a processor, a transceiver, and a memory, and is configured to execute the first aspect and its corresponding implementation manner, and each device of the transmitting end of the sixth aspect may correspond to a corresponding module of the transmitting end of the fifth aspect.
In a seventh aspect, a receiving end is provided, which includes a receiving module and a processing module, and is configured to execute the second aspect and its corresponding implementation manner.
An eighth aspect provides a receiving end comprising a processor, a transceiver and a memory, for executing the second aspect and its corresponding implementation manner, and each device of the receiving end of the eighth aspect may correspond to a corresponding module of the receiving end of the seventh aspect.
In corresponding aspects of the present application and possible implementations thereof, the non-zero elements of the fifth sequence may be distributed at equal intervals; and/or the non-zero elements of the sixth sequence may be equally spaced.
In the corresponding aspects of the present application and possible implementations thereof, the base sequence may be a ZC sequence, a cyclically extended ZC sequence, a truncated ZC sequence, or a reference signal sequence conforming to a standard of a long term evolution LTE system of the third generation partnership project 3 GPP.
In a corresponding aspect of the present application and possible implementations thereof, the fifth sequence may be a sequence obtained by performing an IDFT on the first sequence; the sixth sequence may be a sequence obtained by performing IDFT transform on the second sequence.
In the present application, the time domain symbol may be an OFDM or DFT-S-OFDM symbol.
Drawings
Fig. 1 is a schematic diagram of a communication system for transmitting signals according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a method of transmitting a signal according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a method of transmitting a signal according to another embodiment of the present invention.
Fig. 4 is a schematic diagram of cyclic shifting according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of cyclic shift according to another embodiment of the present invention.
Fig. 6 is a schematic diagram of a method of transmitting a signal according to yet another embodiment of the present invention.
Fig. 7 is a schematic block diagram of a transmitting end of an embodiment of the present invention.
Fig. 8 is a schematic block diagram of a transmitting end according to another embodiment of the present invention.
Fig. 9 is a schematic block diagram of a receiving end of one embodiment of the present invention.
Fig. 10 is a schematic block diagram of a receiving end of another embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be described below with reference to the accompanying drawings.
As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between 2 or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).
It should be understood that the technical solution of the embodiment of the present invention may be applied to a Long Term Evolution (LTE) architecture, and may also be applied to a Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) architecture, or a Radio Access Network (GSM EDGE Radio Access Network, GERAN) architecture of a Global System for Mobile communications (GSM)/Enhanced Data Rate GSM Evolution (Enhanced Data Rate for GSM Evolution, EDGE) System. In the UTRAN architecture or/GERAN architecture, the function of MME is completed by Serving GPRS Support Node (SGSN), and the function of SGW/PGW is completed by Gateway GPRS Support Node (GGSN). The technical solution of the embodiment of the present invention may also be applied to other communication systems, such as a Public Land Mobile Network (PLMN) system, and even a future 5G communication system, and the like, which is not limited in the embodiment of the present invention.
The embodiments of the present invention can be applied to terminal equipment. A terminal device may communicate with one or more core networks via a Radio Access Network (RAN), and a terminal device may refer to a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal device in a future 5G network, etc.
Various embodiments of the present invention may also be applied to network devices. The network device may be a device for communicating with the terminal device, and for example, may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an evolved node B (eNB or eNodeB) in an LTE system, or may be a relay Station, an access point, a vehicle-mounted device, a wearable device, a network-side device in a future 5G network, or a network device in a future evolved PLMN network.
Moreover, various aspects or features of the invention may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard Disk, floppy Disk, or magnetic tape), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD), etc.), smart cards, and flash Memory devices (e.g., Erasable programmable read-Only Memory (EPROM), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.
Fig. 1 is a schematic diagram of a communication system for transmitting signals according to an embodiment of the present invention. As shown in fig. 1, the communication system 100 includes a network device 102, and the network device 102 may include a plurality of antennas, e.g., antennas 104, 106, 108, 110, 112, and 114. Additionally, network device 102 can additionally include a transmitter chain and a receiver chain, each of which can comprise a plurality of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.), as will be appreciated by one skilled in the art.
Network device 102 may communicate with a plurality of terminal devices, such as terminal device 116 and terminal device 122. However, it is understood that network device 102 may communicate with any number of terminal devices similar to terminal devices 116 or 122. End devices 116 and 122 may be, for example, cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device for communicating over wireless communication system 100.
As shown in fig. 1, terminal device 116 is in communication with antennas 112 and 114, where antennas 112 and 114 transmit information to terminal device 116 over forward link 118 and receive information from terminal device 116 over reverse link 120. In addition, terminal device 122 is in communication with antennas 104 and 106, where antennas 104 and 106 transmit information to terminal device 122 over forward link 124 and receive information from terminal device 122 over reverse link 126.
In a Frequency Division Duplex (FDD) system, forward link 118 can utilize a different Frequency band than that used by reverse link 120, and forward link 124 can utilize a different Frequency band than that used by reverse link 126, for example.
As another example, in Time Division Duplex (TDD) systems and Full Duplex (Full Duplex) systems, forward link 118 and reverse link 120 may use a common frequency band and forward link 124 and reverse link 126 may use a common frequency band.
Each antenna (or group of antennas consisting of multiple antennas) and/or area designed for communication is referred to as a sector of network device 102. For example, antenna groups may be designed to communicate to terminal devices in a sector of the areas covered by network device 102. During communication by network device 102 with terminal devices 116 and 122 over forward links 118 and 124, respectively, the transmitting antennas of network device 102 may utilize beamforming to improve signal-to-noise ratio of forward links 118 and 124. Moreover, mobile devices in neighboring cells can experience less interference when network device 102 utilizes beamforming to transmit to terminal devices 116 and 122 scattered randomly through an associated coverage area, as compared to a manner in which a network device transmits through a single antenna to all its terminal devices.
At a given time, network device 102, terminal device 116, or terminal device 122 may be a wireless communication transmitting apparatus and/or a wireless communication receiving apparatus. When sending data, the wireless communication sending device may encode the data for transmission. Specifically, the wireless communication transmitting device may obtain (e.g., generate, receive from other communication devices, or save in memory, etc.) a number of data bits to be transmitted over the channel to the wireless communication receiving device. Such data bits may be contained in a transport block (or transport blocks) of data, which may be segmented to produce multiple code blocks.
It should be understood that embodiments of the present invention may be applied to uplink transmissions, such as 120 and 126 shown in fig. 1, and may also be applied to downlink transmissions, such as 118 and 124 shown in fig. 1. Fig. 1 is a simplified schematic diagram of an example, and other network devices, which are not shown in fig. 1, may be included in the network.
On one hand, Orthogonal Frequency Division Multiplexing (OFDM) technology is widely used in downlink signal transmission in LTE systems due to its characteristics of strong multipath interference resistance, simple implementation of discrete fourier transform, and being beneficial to multi-antenna transmission technology.
Because the OFDM technology is based on a multi-carrier system, the Peak-to-average Power Ratio (PAPR) is high, and the requirement for the linear Power amplifier of the transmitter is high. Because the requirement of the base station side on cost control is not high, a transmitter with good power amplifier linearity can be used, and the downlink transmission generally adopts the OFDM technology. The UE has limited transmission power and is sensitive to cost, and needs to reduce the requirement for power amplification of the transmitter, and the coverage distance needs to satisfy a certain requirement, so uplink transmission usually employs a Single Carrier-Frequency division multiple Access (SC-FDMA) technique. Compared with the OFDM technology, the SC-FDMA technology has lower PAPR, can reduce the requirement on the power amplifier of a transmitter and improve the utilization rate of power.
The SC-FDMA scheme adopted by the LTE system at present is a discrete fourier Transform Spread orthogonal frequency division multiplexing (DFT-S-OFDM) technique. The DFT-S-OFDM technology can realize the peak PAPR performance similar to that of a single carrier signal, and the low PAPR can reduce the complexity and cost of hardware implementation. When the sub-carrier groups occupied by different users are not overlapped, the DFT-S-OFDM can realize the orthogonal frequency division multiple access, thereby obtaining a single carrier orthogonal frequency division multiple access scheme, and therefore, the DFT-S-OFDM technology is particularly suitable for the uplink transmission of a mobile communication system.
In the DFT-S-OFDM technology, an uplink data Signal and an uplink Reference Signal (e.g., a Demodulation Reference Signal (DMRS)) are transmitted in a time division multiplexing manner in order to maintain PAPR performance close to that of a single carrier Signal for transmission of a plurality of signals or channels of one UE.
On the other hand, spectrum is a very expensive resource in wireless communications. Modern Communication systems, such as Global System for Mobile Communication (GSM) systems, Code Division Multiple Access (CDMA) 2000 systems, Wideband Code Division Multiple Access (WCDMA) systems, and 3rd Generation Partnership Project (3 GPP) Long Term Evolution (LTE) systems, typically operate in the spectrum below 3 GHz. With the expansion of intelligent terminal services, especially the emergence of video services, it is difficult for current spectrum resources to meet the explosive increase of capacity demand of users. High frequency bands, particularly millimeter wave bands, having larger available bandwidths are increasingly becoming candidates for next generation communication systems, e.g., 3GHz-200GHz bands.
Different from the working frequency band of the existing LTE system and other systems, the path loss of high-frequency wireless signals is large, and the coverage range is limited when the system is used for wireless communication. The high PAPR of the conventional OFDM further reduces power utilization, and increases the coverage distance degradation of high-frequency radio signals.
A Transmission Time Interval (TTI) of the current LTE system has a length of one subframe, which includes 14 symbols, and the reference signal and the data signal are usually carried in different symbols. The LTE Release14 (Release14, R14) standard will introduce a short TTI feature, where the TTI can be one symbol at the shortest. With short TTI characteristics, one symbol may need to carry both reference and data signals.
For example, one uplink symbol simultaneously carries a DMRS and a Physical Uplink Control Channel (PUCCH), and the DMRS and the PUCCH satisfy mutual orthogonality by code division multiplexing. In the frequency domain, the DMRS and the PUCCH are mapped to the same group of subcarriers using different phases of one base sequence (base sequence), respectively, and the different phases of the base sequence satisfy mutual orthogonality. It should be noted that different phases of one base sequence in the frequency domain correspond to different cyclic shifts of the base sequence in the time domain. Different phases of the base sequence in the frequency domain satisfy orthogonality, and different cyclic shifts thereof in the time domain also satisfy orthogonality. Herein, the expression of one base sequence in the frequency domain is referred to as a frequency-domain base sequence, and the expression in the time domain is referred to as a time-domain base sequence.
Specifically, assuming that a signal code-division multiplexed by a DMRS and a PUCCH is transmitted on one symbol, and an occupied frequency domain Resource is one Resource Block (RB), the length of the base sequence is 12, the DMRS and the PUCCH use two different phases of the base sequence, and the frequency domain signal after code-division multiplexing is represented as:
Figure GPA0000252632840000161
rx(n) a length-12 base sequence for Quadrature Phase Shift Keying (QPSK) modulation, α1And α2Selected from 12 phases, α12Not equal to 0. d (m) is a symbol after QPSK modulation is carried out on 2bits information carried by the PUCCH transmitted on the symbol.
In the above example, since the signal transmitted on one symbol is a signal obtained by superimposing two phase-rotated sequences of one base sequence, and the composite signal s (n) is no longer an SC-FDMA signal, the PAPR increases compared to the SC-FDMA signal, which causes a decrease in power utilization, and affects the uplink performance.
Based on the foregoing description, an embodiment of the present invention provides a method for transmitting a signal, where a sending end maps a first sequence including M elements onto M subcarriers distributed at equal intervals, and maps a second sequence including M elements onto the M subcarriers, where the first sequence is a fourier transform sequence of a fifth sequence, the second sequence is a fourier transform sequence of a sixth sequence, the fifth sequence and the sixth sequence respectively include M elements, where elements of the fifth sequence and the sixth sequence at the same position are not zero at the same time, and the fifth sequence and the sixth sequence are orthogonal in code division, where M is a positive integer; the sending end generates sending signals according to the elements on the M subcarriers; and the sending end sends the sending signal.
The embodiment of the invention constructs two sequences which are orthogonal in code division on the time domain, and elements of the two sequences on the same position are not zero elements at the same time, so that when at least two paths of signals are transmitted in one symbol, the PAPR of signal transmission can be ensured to be lower, and the utilization rate of code resources is not reduced, thereby improving the performance of an uplink.
In each embodiment of the present invention, M subcarriers which may be distributed at equal intervals may be numbered according to the subcarrier frequency from high to low, from low to high, or from high to low, and the index is 0,1, 2. The elements { x (i) } of the first or second sequence are mapped onto subcarriers of M subcarriers with index i, i ═ 0,1, 2.
The M subcarriers equally spaced may be continuously distributed, and in this case, the spacing is 1. The M subcarriers distributed at equal intervals may also be discontinuously distributed at equal intervals, in which case, the intervals are integers greater than 1.
The M subcarriers in each embodiment of the present invention may be all subcarriers in the entire bandwidth, or may be partial subcarriers in the entire bandwidth, which is not limited in this embodiment of the present invention.
In the embodiment of the invention, the time domain symbol can be an OFDM or DFT-S-OFDM symbol.
It should be understood that in the embodiment of the present invention, the code division orthogonal base sequence is time division multiplexed in the time domain, which is equivalent to performing periodic repetition and phase rotation on the code division orthogonal base sequence in the frequency domain, and how to transmit signals will be described in detail below, and it is proved that the method for transmitting signals in the embodiment of the present invention can ensure low PAPR.
In the embodiment of the invention, a transmitting end transmits p paths of signals on the same time domain symbol, wherein p is greater than or equal to 2. Any two signals in the p signals can be combined in various ways, and all the combinations can be applied to the embodiments of the present invention. For example, any two signals may be reference signals, may be a combination of the reference signals and signals of control information carried by a control channel, may also be a combination of the reference signals and signals of data carried by a data channel, may also be a combination of the reference signals and signals carrying other information to be transmitted, and may also be a combination of any two signals except the reference signals in the above signals.
The reference signal may be an uplink reference signal or a downlink reference signal. For example, the Reference Signal may be a Demodulation Reference Signal (DMRS), a cell specific Reference Signal (CRS), a Channel State information Reference Signal (CSI-RS), a Sounding Reference Signal (SRS), and the like, and embodiments of the present invention are not limited thereto.
Correspondingly, the Control information may be Uplink Control information carried by an Uplink Control Channel, such as Uplink Control information carried on a Physical Uplink Control Channel (PUCCH), or Downlink Control information carried by a Downlink Control Channel, specifically, Downlink Control information carried on a Physical Downlink Control Channel (PDCCH).
The data Channel may be an Uplink data Channel, such as a Physical Uplink Shared Channel (PUSCH), or a downlink data Channel, such as a Physical Downlink Shared Channel (PDSCH).
In addition, the other information to be transmitted may include system information carried by a broadcast channel, such as information carried by a Physical Broadcast Channel (PBCH), or a Synchronization Signal used for Synchronization, such as a Primary Synchronization Signal (PSS) or a Secondary Synchronization Signal (SSS).
For ease of understanding, the transmission of signals will be discussed first with reference to any two of the p signals as reference signals.
The two reference signals can be obtained by expanding the time domain base sequence. And the fifth sequence in the two reference signals is expanded by the seventh sequence, and the sixth sequence is expanded by the eighth sequence. The time domain base sequences corresponding to the two time domain signals are respectively a seventh sequence { hiH, wherein the included element is h0,h1,...,hK-1(ii) a And an eighth sequence { jiJ, wherein the included element is j0,j1,...,jK-1
Wherein, in a preferred embodiment, the seventh sequence { h }iAnd an eighth sequence jiThe code division is orthogonal. For example, the seventh sequence hiAnd eighth sequence{jiAnd the sequences are base sequences obtained by performing different cyclic shifts (cyclic shifts) on the same base sequence, and the sequence lengths are all N. Seventh sequence { hiThe cyclic shift of α1Eighth sequence { jiThe cyclic shift of α2,α1And α2Not identical, i.e. α21Not equal to 0. Of course, the two time-domain base sequences of code division orthogonal division may also be obtained in other forms, which is not limited in the embodiment of the present invention.
Seventh sequence { hiAnd an eighth sequence jiAre orthogonal and have the following cross-correlation properties:
Figure GPA0000252632840000181
Figure GPA0000252632840000182
Figure GPA0000252632840000183
is the original base sequence.
Calculate the seventh sequence hiAnd an eighth sequence jiH, r (α)21) Is a time delay of α21Wherein α, in which21Represents a seventh sequence hiAnd an eighth sequence jiRelative cyclic shift of.
Figure GPA0000252632840000191
When α21Is not equal to 0, then (α)21) mod K ≠ 0, seventh sequence { hiAnd an eighth sequence jiThe cross-correlation is 0. Therefore, base sequences obtained by performing different cyclic shifts on the same base sequence are orthogonal.
Wherein the seventh sequence { hiAnd an eighth sequence jiCyclic shift ofDifference α21The K needs to be modulo. This is because the shift of the sequence is cyclic, the seventh sequence hiCompare the eighth sequence { j }iThe cyclic shift is equivalent to a seventh sequence h after the number of bits exceeds KiAnd an eighth sequence jiThe relative distance of cyclic shifts is actually (α)21)mod K。
For the sake of discussion below, it is assumed that p equals 2, i.e., there are only two signals. From the time domain perspective, the processing of the two signals may be as follows.
For the seventh sequence { h respectivelyiAnd an eighth sequence jiCarry out odd number bit and even number bit insertion zero respectively to get
The fifth sequence
Figure GPA0000252632840000192
Sixth sequence
Figure GPA0000252632840000193
That is to say that the first and second electrodes,
fifth sequence { fi}=h0,0,h1,0,...,hK-1,0 i=0,1,...,2K-1
Sixth sequence gi}=0,j0,0,j1,...,0,jK-1i=0,1,...,2K-1
It is demonstrated below that for the code-division orthogonal seventh sequence hiAnd an eighth sequence jiGet the fifth sequence { f after zero insertion respectivelyiAnd a sixth sequence giThe code division is still orthogonal.
Calculate the fifth sequence fiAnd a sixth sequence giR (α ') is a discrete periodic correlation function with a time delay of α ', wherein α ' is the fifth sequence { f }iAnd a sixth sequence giRelative cyclic shift of.
Figure GPA0000252632840000201
When α2+(α′-1)/2-α1If not equal to 0, then (α)2+(α′-1)/2-α1) mod 2K ≠ 0, so that R (α') is 0, seventh sequence { h ≠ hiAnd an eighth sequence jiIs 0, when the fifth sequence fiAnd a sixth sequence giThe code division is orthogonal.
In order to reduce the PAPR of the final transmitted signal, the non-zero elements of the two time domain signals before DFT need to be multiplexed, i.e., the fifth sequence { f }iAnd a sixth sequence giThe elements at the same position are not simultaneously non-zero elements. Wherein, the identical position means that in two time domain sequences which also comprise M elements, the positions of the elements in the sequences are identical. In other words, the elements of the fifth and sixth sequences at the same time are not zero at the same time. In this way, in the time domain, the seventh sequence corresponding to the fifth sequence and the eighth sequence corresponding to the sixth sequence are time-division multiplexed, so that the transmitted signal has a low PAPR after the two sequences are subjected to a series of subsequent transforms such as DFT, IFFT, and the like, and other processes.
The time domain sequence after multiplexing can be recorded as { Ti}
{Ti}=fi+gi=h0,j0,h1,j1,...,hK-1,jK-1i=0,1,...,2K-1。
In summary, first, the fifth sequence and the sixth sequence are formed in code division orthogonality.
It should be understood that, in the embodiment of the present invention, the fifth sequence and the sixth sequence are orthogonal to each other by code division, but the seventh sequence and the eighth sequence may or may not be orthogonal to each other by code division because when (α) is satisfied2+(α′-1)/2-α1) mod 2K ≠ 0 condition, then it is allowed (α)21) mod K is 0, i.e., the seventh and eighth sequences are allowed to be cyclically shifted and identical modulo K. For example, the seventh sequence and the eighth sequence may be the same base sequence, and when the seventh sequence is expanded to obtain the fifth sequence and the eighth sequence is expanded to obtain the sixth sequence, the appropriate expansion manner is adopted(e.g., odd and even bit zero-insertions, respectively, for the same base sequence) such that the fifth and sixth sequences are code-division orthogonal.
In the embodiment of the invention, the nonzero elements in the time domain sequence obtained in the mode of time domain base sequence expansion are distributed at equal intervals. In the embodiment of the present invention, when the time domain sequence may also be obtained in other manners, the non-zero elements are not necessarily distributed at equal intervals. Therefore, the non-zero elements of the fifth sequence are equally spaced; and/or the non-zero elements of the sixth sequence are equally spaced. The embodiment of the invention does not limit whether the non-zero data are distributed at equal intervals.
The fifth sequence and the sixth sequence obtained by the above-mentioned expansion mode respectively include M elements, and the elements of the fifth sequence and the sixth sequence at the same position are not zero elements at the same time. The seventh and eighth sequences each include K elements, and M ═ p × K. Corresponding to the above description, p is equal to 2, i.e. when there are two signals on M subcarriers, M is 2K. The embodiment of the present invention may also expand the base sequence in other manners to obtain a fifth sequence and a sixth sequence that are orthogonal to each other by code division, which is not limited in the embodiment of the present invention.
Then, there are various ways to map the time-domain sequence to M subcarriers after transformation.
One of the ways may be: performing a first transformation on the fifth sequence to obtain a first sequence, wherein the first transformation is an M × M Discrete Fourier Transform (DFT), and the first sequence comprising M elements is mapped onto M subcarriers; and/or performing a second transform on the sixth sequence to obtain a second sequence, wherein the second transform is an M × M DFT, and the second sequence including M elements is mapped onto the same M subcarriers.
It should be understood that "and/or" herein means that the operation of performing mxm DFT on the time-domain sequence to obtain the frequency-domain sequence, and then mapping the frequency-domain sequence to M subcarriers, may be performed only on the fifth sequence, and may be performed in other manners on the sixth sequence; it is also possible to implement only the sixth sequence and take other ways for the fifth sequence; the fifth sequence and the sixth sequence may be implemented, which is not limited in the embodiment of the present invention.
Corresponding to the above description, as shown in FIG. 2, a fifth sequence { fiAnd a sixth sequence giDFT of 2K × 2K is performed respectively and then mapped to the same subcarrier group having 2K subcarriers. This can also be considered as for the fifth sequence fiAnd a sixth sequence giAnd performing 2 Kx 2K DFTs respectively, mapping the DFTs to the same subcarrier group with 2K subcarriers, and adding the DFTs. Or it can be considered that for the fifth sequence { f }iAnd a sixth sequence giDFT of 2K × 2K is performed separately and then added, and mapped to a subcarrier group having 2K subcarriers.
Another way may be: as shown in FIG. 3, a fifth sequence { f }iAnd a sixth sequence giGet the time domain sequence { T }by addingiIs to { T }iThe DFT of 2K × 2K is performed and then mapped to a subcarrier group having 2K subcarriers, and implementations of embodiments of the present invention may be various and are not limited herein.
The process of transmitting signals is described above by taking any two signals as reference signals as an example. It should be understood that when there is a signal of control information carried by a control channel, a data signal carried by a data channel, or a signal carrying other information to be transmitted in any two signals, the signal may be multiplied by a corresponding sequence in a time domain stage or a frequency domain stage formed by the signals to carry the information to be transmitted.
Then, the transmitting end transforms the elements on the M subcarriers to the time domain, generates and transmits a transmission signal. Specifically, the transmitting end may perform zero padding on elements on M subcarriers, that is, both ends of the frequency domain signal, and then perform Transformation such as Inverse Fast Fourier Transform (IFFT) to generate a signal on the time domain, that is, a transmission signal, and transmit the signal through an antenna. Of course, other processing may be performed on the signal during this process, and the present invention is not limited thereto.
In a preferred embodiment of the invention, therefore, a first sequence comprising M elements is mapped onto M sub-carriers,the method comprises the following steps: determining a fifth sequence, a fifth sequence f0,f1,...,fM-1Is composed of a seventh sequence h with length K0,h1,...,hK-1Expanded by a seventh sequence h0,h1,...,hK-1In the fifth sequence f0,f1,...,fM-1Medium spacing distribution, spacing p, M ═ p × K, fifth sequence f0,f1,...,fM-1In which K elements h of the seventh sequence are divided0,h1,...,hK-1The other elements are zero elements; performing M multiplied by M DFT on the fifth sequence, and mapping the fifth sequence to M subcarriers; mapping a second sequence comprising M elements onto M subcarriers, comprising: determining the sixth sequence, the sixth sequence g0,g1,...,gM-1Is composed of an eighth sequence j of length K0,j1,...,jK-1Expanded, eighth sequence j0,j1,...,jK-1In the sixth sequence g0,g1,...,gM-1Medium spacing distribution, spacing p, M ═ p × K, sixth sequence g0,g1,...,gM-1Dividing the eighth sequence by K elements j0,j1,...,jK-1The other elements are zero elements; and performing M multiplied by M DFT on the sixth sequence, and mapping the sixth sequence to M subcarriers.
The above is described by taking an example that two time domain signals are transmitted on the same time domain symbol, and the method can also be extended to the case of multiple (for example, p) time domain signals. The sequences of the multi-channel time domain signals after code division and time division meet code division orthogonality. For example, the three time domain signals may be:
fifth sequence { fi}=h0,0,0,h1,0,0,...,hK-1,0,0 i=0,1,...,3K-1
Sixth sequence gi}=0,j0,0,0,j1,0,...,0,j K-10, i=0,1,...,3K-1
Tenth sequence ni}=0,0,q0,0,0,q1,...,0,0,qK-1i=0,1,...,3K-1
The time domain sequence after multiplexing of the three time domain signals can be recorded as { T }i}
{Ti}=fi+gi+ni=h0,j0,q0,h1,j1,q1,...,hK-1,jK-1,qK-1i=0,1,...,3K-1。
At this time, M ═ 3K; for any extension, M ═ p × K. It can be proved that the sequences of the time domain signals after code division and time division still satisfy code division orthogonality. When the three time domain signals are transmitted on the same time domain symbol, code division orthogonality is satisfied between any two sequences of the fifth sequence, the sixth sequence and the tenth sequence.
In the embodiment of the present invention that obtains code division orthogonal signals by cyclically shifting the time domain base sequence, when transmitting through a wireless channel, because the damage of the time delay spread of the channel to the orthogonality of the cyclic shifts needs to be overcome, a sufficient interval may need to be present between the corresponding cyclic shifts, that is, greater than the time delay spread, and therefore not all cyclic shifts can be used as orthogonal sequences. Taking the basic sequence with the length of 12 as an example, the basic sequence has 12 cyclic shifts, and if the interval between the cyclic shifts is required to be 2, only 6 cyclic shifts with equal intervals can be configured for the user. After the requirements are met, the signals of the sending end are orthogonal in code division, and after the signals are transmitted through a wireless channel, the orthogonal in code division can still be met at the receiving end.
For the embodiment of the present invention, taking multiplexing of two sequences as an example, the length of the base sequence is shortened to 6, and the length of the sequence after zero insertion is 12. Although the length of the base sequence is shortened, since the 12-long sequence after the cyclic shift zero insertion of the base sequence still satisfies the cyclic shift orthogonality, if the interval requirement of the cyclic shift is still 2, the requirement of the cyclic shift interval of the base sequence with the length of 6 can be shortened to 1 in order to ensure the orthogonality, the number of cyclic shifts which can be allocated to the user is still 6, and the reduction due to the shortening of the length of the base sequence is not caused. This is because two 12-long sequences after zero insertion of odd and even bits, respectively, are cyclically shifted by 2bits, corresponding to 6-long base sequences cyclically shifted by 1 bit, as shown in fig. 4.
Similarly, the case of multiplexing three sequences is shown in fig. 5. Taking three sequence multiplexing as an example, the length of the base sequence is shortened to 4, and the length of the sequence after zero insertion is 12. The zero-inserted 12-long sequence is cyclically shifted by 3 bits, which corresponds to a 4-long base sequence cyclically shifted by 1 bit. However, since the base sequence has only 4 bits at this time, the maximum available cyclic shift number is 4, and the cyclic shift interval of 1 still satisfies the requirement that the available cyclic shift interval of the corresponding base sequence of 12 lengths is 2.
It is proved that, by obtaining two time domain sequences orthogonal to each other by expanding two base sequences respectively and performing time division multiplexing on the two base sequences, the method of the embodiment of the invention has the advantages that the utilization rate of code resources of a system is not reduced compared with the existing code division multiplexing mode, and the method of the embodiment of the invention can ensure low PARK and simultaneously can ensure high utilization rate of the code resources.
In addition, in the embodiment of the present invention, a time domain signal having a low PAPR may also be generated by a method of generating a corresponding frequency domain signal.
From the perspective of the frequency domain, the processing procedure of the two signals is as shown in fig. 6:
third sequence { crComprises the element c0,c1,...,cK-1Fourth sequence { drComprises the element d0,d1,...,dK-1. Third sequence { crAnd a fourth sequence drThe sequences can be obtained by performing phase rotation on the same frequency domain base sequence, wherein the phase rotation is β respectively1And β2
Figure GPA0000252632840000231
Figure GPA0000252632840000241
{xrComprises the element x0,x1,...,xK-1Is the original frequency domain base sequence.
Corresponding to the description in the time domain, when β21And when the correlation is not equal to 0, the cross correlation of the third sequence and the fourth sequence is 0. Therefore, the sequences obtained by performing different phase rotations on the same frequency domain base sequence are orthogonal.
Then, the third sequences { c are respectively alignedrAnd a fourth sequence drThe first sequence { a } is obtained by repeating the period and rotating the phaseiIs composed of an element a0,a1,...,aM-1(ii) a And a second sequence biIs composed of an element b0,b1,...,bM-1
Third sequence { c of length K, for example, M2KrThe period is repeated and the phase is rotated to obtain a first sequence { d } with the length of 2Kr}
Figure GPA0000252632840000242
Where u is ∈ {0, 1 }.
Similarly, the fourth sequence of length K { drThe period is repeated and the phase is rotated to obtain a second sequence { b with the length of 2Ki}
Figure GPA0000252632840000243
Where v ∈ {0, 1 }.
In the embodiment of the present invention, the first sequence and the second sequence are orthogonal to each other by code division, but the third sequence and the fourth sequence may be orthogonal to each other by code division or may not be orthogonal to each other by code division. Similarly to the analysis in the time domain, when a certain condition is satisfied, the phase rotations of the third sequence and the fourth sequence are allowed to be the same modulo K. For example, the third sequence and the fourth sequence may be the same base sequence, and when the third sequence is periodically repeated to obtain the first sequence and the fourth sequence is periodically repeated to obtain the second sequence, the first sequence and the second sequence are code-division orthogonal by using a suitable spreading method (for example, using periodic repetition and different phase rotations for the same base sequence).
Accordingly, the first sequence is a0,a1,...,aM-1The frequency domain sequence corresponding to the seventh sequence is a third sequence c with the length of K0,c1,...,cK-1The first sequence is expanded by the third sequence, and the second sequence is b0,b1,...,bM-1The frequency domain sequence corresponding to the eighth sequence is a fourth sequence d with the length of K0,d1,...,dK-1The second sequence is extended by a fourth sequence, where M ═ p × K,
Figure GPA0000252632840000251
i is a variable, i takes on a value of 0, 1., M-1, u and v are each one of 0, 1., p-1, and v is not equal to u.
Then, the third sequence { ciAnd a fourth sequence diMapped to the same M subcarriers. The transmitting end performs IFFT and other transformations on elements on M subcarriers, namely two ends of a frequency domain signal after zero padding, generates a signal on a time domain, namely a transmitting signal, and transmits the signal through an antenna.
As can be seen from the above description, a method for transmitting a signal only from a frequency domain perspective includes: the sender will include a first sequence a of M elements0,a1,...,aM-1Mapping to M subcarriers distributed at equal intervals and a second sequence b comprising M elements0,b1,...,bM-1Mapping to the M subcarriers, where the M subcarriers are subcarriers on the same time domain symbol, the first sequence and the second sequence are orthogonal in code division, and the first sequence a0,a1,...,aM-1Is composed of a third sequence c with length K0,c1,...,cK-1Extended, the second sequence b0,b1,...,bM-1Is composed of a fourth sequence d of length K0,d1,...,dK-1Expanded, M ═ p × K,
Figure GPA0000252632840000252
Figure GPA0000252632840000253
i is a variable, i takes a value of 0,1,., M-1, u and v are respectively one of 0,1,., p-1, and v is not equal to u, wherein M, p and K are positive integers; the sending end generates sending signals according to the elements on the M subcarriers; and the sending end sends the sending signal.
The method of transmitting a signal provided by the embodiment of the present invention repeats and rotates the phase by a period (wherein,
Figure GPA0000252632840000254
in the two equations, the part before the multiplication on the right side of the equal sign is a periodic repetition operation, and the part after the multiplication is a phase rotation operation) to construct two sequences orthogonal to the code division, so that when at least two paths of signals are transmitted in one symbol, the PAPR of signal transmission can be ensured to be low, and meanwhile, the utilization rate of code resources is not reduced, thereby improving the performance of an uplink.
The third sequence c is used for obtaining the first sequence and the second sequence which are orthogonal in code division0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure GPA0000252632840000261
r is variable and the value of r is 0,11And β2One value of 0,1, K-1, respectively.
Two code division orthogonal sequences (β) can be obtained by cyclic shifting a base sequence1And β2When they are not equal), namely the third sequence and the fourth sequence, and then the third sequence and the fourth sequence are periodically repeated and combinedThe phase rotation constructs a first sequence and a second sequence of code division quadrature β1And β2Or may be equal, β1And β2When the values are equal, the code division orthogonality of the third sequence and the fourth sequence can still be ensured because v is not equal to u.
Because two signals are simultaneously transmitted on M subcarriers of the same time domain symbol, the transmitting end needs to notify the receiving end of the related information of cyclic shift of the two signals, so as to facilitate the decoding of the receiving end.
Therefore, the method may further include the transmitting end transmitting a first signaling, the first signaling including first cyclic shift parameter information of the first sequence, the first cyclic shift parameter information being associated with u and β1The sending end sends a second signaling, the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is related to v and β2And (4) correlating.
In another more general aspect of an embodiment of the present invention, the third sequence c0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Can be the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure GPA0000252632840000262
r is variable and the value of r is 0,11And α2Is any real number.
In other words, the third sequence and the fourth sequence may also be sequences expressed in the form that
Figure GPA0000252632840000263
r is variable and the value of r is 0,11And α2Any real number may be used. For example,
Figure GPA0000252632840000264
λ1and λ2Are respectively 0,11K-1 and 0, 1.. q.2K-1, thus, α1And α2Are respectively taken as
Figure GPA0000252632840000265
And
Figure GPA0000252632840000266
the above is illustrative of α1、α2Wherein q is1And q is2The value of (a) is not limited, and may be any real number, such as 1, 2, or p.
In an alternative arrangement, when q is1And q is2When the value is equal to p, the value,
Figure GPA0000252632840000271
wherein λ is1And λ2Each is any one of 0, 1.. and pK-1. Lambda [ alpha ]1And λ2May be equal to or different from each other, and is not limited in this embodiment of the present invention.
Similarly, the method may further include the transmitting end transmitting a first signaling, the first signaling including first cyclic shift parameter information of the first sequence, the first cyclic shift parameter information being associated with u and α1The sending end sends a second signaling, the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is related to v and α2And (4) correlating.
It should be understood that the first signaling and the second signaling may be sent to the same receiving end, or may be sent to different receiving ends. The first signaling is sent to a receiving end for receiving the first sequence, and the second signaling is sent to a receiving end for receiving the second sequence. The first signaling and the second signaling may be combined and transmitted in the same message, or may be separately transmitted. When the first signaling and the second signaling are sent to the same receiving end, the preferred first signaling and the preferred second signaling may be combined and sent in the same message, which is not limited in the embodiment of the present invention.
Specifically, it can be made of
Figure GPA0000252632840000272
Substitution into
Figure GPA0000252632840000273
Obtaining:
Figure GPA0000252632840000274
in the same way, the method for preparing the composite material,
Figure GPA0000252632840000275
thus, the first and second sequences of length M can be represented as a base sequence xiThe cyclic shifted spreading sequences of (1) are p β1+ u and p β2+ v, the cyclic shift may be signaled to a receiving end, e.g. a terminal device, by signaling (e.g. first signaling and second signaling).
In an implementation of the present invention, the generating, by the sending end, a sending signal according to the elements on the M subcarriers may include: and the sending end maps the first sequence and the second sequence to the M subcarriers, and transforms elements of the M subcarriers to a time domain to generate a sending signal. Or, the sending end carries the information to be transmitted on the first sequence or the second sequence on the M subcarriers, and transforms the elements carrying the information to be transmitted on the M subcarriers to the time domain to generate a sending signal.
In other words, the transmission signal in the embodiment of the present invention may include a reference signal or a data signal carrying information to be transmitted. The signal in the present invention may be a modulated signal. When the transmit signal is transmitted over multiple antennas, Spatial Precoding (Spatial Precoding) may also be performed before transforming the upper elements on the M subcarriers to the time domain, and different signals may have different Spatial Precoding. It should be understood that the final result obtained by processing the signal from the frequency domain angle is the same as the final result obtained by processing the signal from the time domain angle in the embodiments of the present invention.
The principle of processing the sequence from a frequency domain perspective and processing the sequence from a time domain perspective in an embodiment of the present invention is described in detail below.
Thus, performing odd-point zero insertion on the sequence in the time domain corresponds to performing spreading in the frequency domain (periodic repetition plus phase rotation 1); even point zero insertion of the sequence in the time domain is equivalent to spreading in the frequency domain (period repetition plus phase rotation 2). Here, the phase rotation 1 and the phase rotation 2 are different phase rotations.
The embodiments of the present invention can realize the extension of the sequence by flexibly applying zero insertion, periodic repetition, phase rotation, etc.
It should be understood that, in the embodiment of the present invention, the fifth sequence and the first sequence are respectively a time domain representation and a frequency domain representation of the same sequence; the sixth sequence and the second sequence are a time domain representation and a frequency domain representation, respectively, of the other sequence. The seventh sequence and the third sequence are respectively a time domain representation and a frequency domain representation of the same base sequence; the eighth sequence and the fourth sequence are a time domain representation and a frequency domain representation, respectively, of another base sequence. The fifth sequence is obtained by performing Inverse Discrete Fourier Transform (IDFT) on the first sequence; the sixth sequence is a sequence obtained by performing IDFT conversion on the second sequence. The first sequence is a sequence obtained by performing discrete Fourier transform (IDFT) on the fifth sequence; the second sequence is a sequence obtained by performing DFT conversion on the sixth sequence.
For the case where M subcarriers carry multiple signals, the method for transmitting signals according to the embodiment of the present invention may further include:
the sending end maps a ninth sequence comprising M elements to M subcarriers, wherein the time domain sequence corresponding to the ninth sequence is a tenth sequence, any two time domain sequences in the tenth sequence, the fifth sequence and the sixth sequence are not non-zero elements at the same position at the same time, the tenth sequence is obtained by expanding a third base sequence, and any two base sequences in the first base sequence, the second base sequence and the third base sequence are orthogonal in code division.
In the embodiment of the invention, the base sequence can be a ZC sequence, a cyclic extended sequence of the ZC sequence, a truncated sequence of the ZC sequence or a third generation-compliant sequenceReference signal sequences of standards for the long term evolution LTE system of the 3rd Generation Partnership Project (3 GPP). The cyclic extended ZC sequence and the ZC sequence truncation are described below with reference to the following examples. The length of the uplink reference signal of the LTE system is generally an integer multiple of RB, i.e., an integer multiple of 12. But the sequence of ZC used to generate the reference signal is not necessarily an integer multiple of 12, and when the length of ZC sequence is smaller than that of the reference signal, the sequence of the reference signal is generated by cyclic extension of ZC sequence; when the length of the ZC sequence is greater than the length of the reference signal, a sequence of the reference signal is generated by truncation of the ZC sequence. For example, ZC sequence XiIs M, reference signal YiIs N, when M < N, then Yi=Xi mod MI-0, 1, ·, N-1; when M > N, then Yi=Xi,i=0,1,...,N-1。
In a specific example, the base sequence may be a ZC sequence (i.e., a Zadoff-Chu sequence). ZC sequences have good correlation, otherwise known as cyclic shift characteristics, i.e. an arbitrary ZC original sequence is uncorrelated with its sequence obtained after cyclic shift by n bits, where n is not zero modulo the sequence length, i.e. the autocorrelation peak is sharp. The ZC sequence has good cross-correlation property, and the cross-correlation value is close to zero. The ZC sequence has a low PAPR. After Fast Fourier Transform (FFT) or Inverse Fast Fourier Transform (IFFT) is performed on any ZC sequence, it remains as a ZC sequence. It should be understood that the base sequence may correspond to other Constant envelope Zero Auto Correlation (CAZAC) sequences, etc., in addition to the ZC sequence. The base sequence may also be other sequences with low PAPR, which is not limited in this embodiment of the present invention.
For the receiving end, the method for transmitting the signal at the receiving end side comprises the following steps: a receiving end receives radio frequency signals from M subcarriers, wherein the M subcarriers are subcarriers on the same time domain symbol; the receiving end carries out Fast Fourier Transform (FFT) on the radio frequency signal to obtain a first receiving signal corresponding to a first sequence and a second receiving signal corresponding to a second sequence, wherein a time domain sequence corresponding to the first sequence is a fifth sequence, a time domain sequence corresponding to the second sequence is a sixth sequence, the fifth sequence and the sixth sequence respectively comprise M elements, the elements of the fifth sequence and the sixth sequence at the same position are not zero elements at the same time, and the fifth sequence and the sixth sequence are orthogonal in code division; and the receiving end processes the first receiving signal and the second receiving signal.
The characteristics of the first sequence, the second sequence, the fifth sequence, the sixth sequence, the third sequence, the fourth sequence, the seventh sequence, and the eighth sequence are consistent with the characteristics of the corresponding sequences of the transmitting end described above, and are not described herein again.
The signal processing in the embodiment of the present invention may specifically include equalization, IDFT, and the like for a data signal, and may specifically include channel estimation and the like for a reference signal.
Accordingly, the signal processing of the first received signal and the second received signal by the receiving end may include: the receiving end carries out Inverse Discrete Fourier Transform (IDFT) on the first received signal to obtain a fifth sequence corresponding to the first sequence; and/or the receiving end carries out Inverse Discrete Fourier Transform (IDFT) on the second receiving signal to obtain a sixth sequence corresponding to the second sequence.
When the first received signal or the second received signal is a data signal, for example, a Physical Downlink Shared Channel (PDSCH), the signal processing further includes performing an equalization operation on the data signal.
Correspondingly to the transmitting end, in addition to the two signals described above, the receiving end performs Fast Fourier Transform (FFT) on the radio frequency signal to obtain a third received signal corresponding to a ninth sequence, where the time domain sequence corresponding to the ninth sequence is a tenth sequence, any two time domain sequences in the tenth sequence, the fifth sequence and the sixth sequence are non-zero elements at the same position, and any two time domain sequences in the fifth sequence, the sixth sequence and the tenth sequence are orthogonal in code division; and the receiving end processes the third received signal.
From the perspective of the frequency domain, an embodiment of the present invention provides a method for transmitting a signal, including: on the receiving endReceiving signals on M subcarriers distributed at equal intervals, wherein the M subcarriers are subcarriers on the same time domain symbol; the receiving end carries out Fast Fourier Transform (FFT) on the signal to obtain a first sequence a0,a1,...,aM-1Corresponding first received signal and second sequence b0,b1,...,bM-1A corresponding second received signal, wherein the first sequence and the second sequence are code division orthogonal, and the first sequence a0,a1,...,aM-1Is composed of a third sequence c with length K0,c1,...,cK-1Extended, the second sequence b0,b1,...,bM-1Is composed of a fourth sequence d of length K0,d1,...,dK-1Expanded, M ═ p × K,
Figure GPA0000252632840000301
i is a variable, i takes a value of 0,1,., M-1, u and v are respectively one of 0,1,., p-1, and v is not equal to u, wherein M, p and K are positive integers; and the receiving end processes the first receiving signal and the second receiving signal.
In one embodiment, the third sequence
Figure GPA0000252632840000314
And the fourth sequence
Figure GPA0000252632840000315
Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure GPA0000252632840000311
r is variable and the value of r is 0,11And β2One value of 0,1, K-1, respectively.
In an embodiment of the present invention, the method of the receiving end side may further include: the receiving end receives the first signaling,the first signaling comprises first cyclic shift parameter information of the first sequence, the first cyclic shift parameter information is associated with u and β1Receiving a second signaling by the receiving end, wherein the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is related to v and β2And (4) correlating. The receiving end can analyze the data according to the cyclic shift parameter information.
In another embodiment, the third sequence c0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure GPA0000252632840000312
r is variable and the value of r is 0,11And α2Is any real number.
Alternatively, α1And α2Can take on values of
Figure GPA0000252632840000313
Wherein λ is1And λ2Each is any one of 0, 1.. and pK-1.
In the embodiment of the present invention, the method may further include the receiving end receiving a first signaling, where the first signaling includes first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and α1Receiving a second signaling by the receiving end, wherein the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is related to v and α2And (4) correlating.
The method for transmitting signals according to the embodiment of the present invention is described in detail with reference to fig. 1 to 6, and the transmitting end and the receiving end according to the embodiment of the present invention are described below.
Fig. 7 shows a transmitting end 700 according to an embodiment of the present invention, including:
a processing module 710, configured to map a first sequence including M elements onto M subcarriers distributed at equal intervals, and map a second sequence including M elements onto the M subcarriers, where the first sequence is a fourier transform sequence of a fifth sequence, the second sequence is a fourier transform sequence of a sixth sequence, the fifth sequence and the sixth sequence respectively include M elements, elements of the fifth sequence and the sixth sequence at the same position are not zero elements at the same time, and the fifth sequence and the sixth sequence are orthogonal in code division;
the processing module 710 is further configured to generate a transmission signal according to the elements on the M subcarriers;
the sending module 720 is configured to send the sending signal generated by the processing module.
The sending end of the embodiment of the invention constructs two sequences which are orthogonal in code division on the time domain, and elements of the two sequences on the same position are not zero elements at the same time, so that when at least two paths of signals are sent in one symbol, the PAPR of signal transmission can be ensured to be lower, and the utilization rate of code resources is not reduced, thereby improving the performance of an uplink.
Optionally, as an embodiment, the fifth sequence is extended by a seventh sequence, the sixth sequence is extended by an eighth sequence, and the seventh sequence and the eighth sequence are orthogonal by code division.
Optionally, as an embodiment, the seventh sequence and the eighth sequence are sequences obtained by performing different cyclic shifts on the same base sequence.
Optionally, as an embodiment, the first sequence is a0,a1,...,aM-1The frequency domain sequence corresponding to the seventh sequence is a third sequence c with the length of K0,c1,...,cK-1The first sequence is expanded from the third sequence, and the second sequence is b0,b1,...,bM-1The frequency domain sequence corresponding to the eighth sequence is a fourth sequence d with the length of K0,d1,...,dK-1The second sequence is augmented by the fourth sequence, wherein M ═ p × K,
Figure GPA0000252632840000321
i is a variable, i takes on a value of 0, 1., M-1, u and v are each one of 0, 1., p-1, and v is not equal to u.
Optionally, as an embodiment, before the processing module 710 maps the first sequence including M elements onto M subcarriers distributed at equal intervals, the processing module 710 is further configured to:
performing a first transformation on the fifth sequence to obtain the first sequence, wherein the first transformation is a Discrete Fourier Transform (DFT) of M × M; and/or
Before the processing module 710 maps the second sequence comprising M elements onto M subcarriers, the processing module 710 is further configured to:
and performing a second transform on the sixth sequence to obtain the second sequence, wherein the second transform is an mxm DFT.
Optionally, as an embodiment, the processing module 710 is specifically configured to:
determining the fifth sequence, the fifth sequence f0,f1,...,fM-1Is composed of said seventh sequence h of length K0,h1,...,hK-1Expanded by the seventh sequence h0,h1,...,hK-1In the fifth sequence f0,f1,...,fM-1A medium spacing distribution with p, M ═ p × K, and the fifth sequence f0,f1,...,fM-1Except the K elements h of the seventh sequence0,h1,...,hK-1The other elements are zero elements;
performing M × M DFT on the fifth sequence, and mapping the fifth sequence to the M subcarriers;
determining the sixth sequence, the sixth sequence g0,g1,...,gM-1Is formed by said eighth sequence j of length K0,j1,...,jK-1Expanded by the eighth sequence j0,j1,...,jK-1In the sixth sequence g0,g1,...,gM-1A medium spacing distribution with p, M ═ p × K, and the sixth sequence g0,g1,...,gM-1Dividing K elements j of the eighth sequence0,j1,...,jK-1The other elements are zero elements;
and performing M × M DFT on the sixth sequence, and mapping the sixth sequence to the M subcarriers.
Optionally, as an embodiment, the processing module 710 is further configured to:
mapping a ninth sequence comprising M elements onto the M subcarriers, wherein the ninth sequence is a fourier transform sequence of a tenth sequence, elements of any two time domain sequences in the tenth sequence, the fifth sequence and the sixth sequence at the same position are not zero elements at the same time, and any two time domain sequences in the fifth sequence, the sixth sequence and the tenth sequence are orthogonal in code division.
Optionally, as an embodiment, the non-zero elements of the fifth sequence are distributed at equal intervals; and/or
The non-zero elements of the sixth sequence are equally spaced.
Alternatively, as an embodiment, the base sequence is a ZC sequence, a cyclically extended ZC sequence, a truncated ZC sequence, or a reference signal sequence conforming to a standard of a long term evolution LTE system of the third generation partnership project 3 GPP.
Optionally, as an embodiment, the fifth sequence is a sequence obtained by performing Inverse Discrete Fourier Transform (IDFT) on the first sequence; the sixth sequence is obtained by performing IDFT conversion on the second sequence.
The following can be implemented using the transmitting end 700 of the embodiment of the present invention when only considered from the perspective of the frequency domain.
A processing module 710 for converting a first sequence a comprising M elements0,a1,...,aM-1Mapping to M subcarriers distributed at equal intervals and a second sequence b comprising M elements0,b1,...,bM-1Mapping to the M subcarriers, where the M subcarriers are subcarriers on the same time domain symbol, the first sequence and the second sequence are orthogonal in code division, and the first sequence a0,a1,...,aM-1Is composed of a third sequence c with length K0,c1,...,cK-1Extended, the second sequence b0,b1,...,bM-1Is composed of a fourth sequence d of length K0,d1,...,dK-1Expanded, M ═ p × K,
Figure GPA0000252632840000341
i is a variable, i takes a value of 0,1,., M-1, u and v are respectively one of 0,1,., p-1, and v is not equal to u, wherein M, p and K are positive integers;
the processing module 710 is further configured to generate a transmission signal according to the elements on the M subcarriers;
a sending module 720, configured to send the sending signal generated by the processing module.
Optionally, as an embodiment, the third sequence c0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure GPA0000252632840000342
r is variable and the value of r is 0,11And α2Is any real number.
Alternatively, the processor may, as an embodiment,
Figure GPA0000252632840000343
wherein λ is1And λ2Are all 0 in the total number of the components,1, pK-1.
Optionally, as an embodiment, the sending module 720 may be further configured to send a first signaling, where the first signaling includes first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and α1And sending a second signaling, wherein the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is related to v and α2And (4) correlating.
Optionally, as an embodiment, the third sequence c0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure GPA0000252632840000351
r is variable and the value of r is 0,11And β2One value of 0,1, K-1, respectively.
Optionally, as an embodiment, the sending module 720 is further configured to:
sending a first signaling, wherein the first signaling comprises first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and β1Correlation;
sending a second signaling, wherein the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is associated with v and β2And (4) correlating.
Optionally, as an embodiment, the processing module 710 generates a transmission signal according to the elements on the M subcarriers, including:
and bearing the information to be transmitted on the M subcarriers, and transforming elements bearing the information to be transmitted on the M subcarriers to a time domain to generate a sending signal.
Optionally, as an embodiment, the motif sequence is a ZC sequence, a cyclically extended ZC sequence, a truncated ZC sequence, or a reference signal sequence conforming to a standard of a long term evolution LTE system of the third generation partnership project 3 GPP.
It should be noted that, in the embodiment of the present invention, the processing module 710 may be implemented by a processor, and the transmitting module 720 may be implemented by a transceiver. As shown in fig. 8, the transmitting end 800 may include a processor 810, a transceiver 820, and a memory 830. Memory 830 may be used, among other things, to store code executed by processor 810.
The various components in the transmit end 800 are coupled together by a bus system 840, where the bus system 840 includes a power bus, a control bus, and a status signal bus in addition to a data bus.
The transmitting end 700 shown in fig. 7 or the transmitting end 800 shown in fig. 8 can implement the processes implemented in the foregoing embodiments of fig. 1 to fig. 6, and for avoiding repetition, details are not repeated here.
It should be noted that the above-described method embodiments of the present invention may be applied to or implemented by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic device, discrete hardware component. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.
It will be appreciated that the memory in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. The volatile Memory may be a Random Access Memory (RAM) which functions as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and direct memory bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
Fig. 9 shows a receiving end 900 according to an embodiment of the present invention, which includes:
a receiving module 910, configured to receive signals on M subcarriers distributed at equal intervals, where the M subcarriers are subcarriers on the same time domain symbol;
a processing module 920, configured to perform fast fourier transform FFT on the signal received by the receiving module 910 to obtain a first received signal corresponding to a first sequence and a second received signal corresponding to a second sequence, where the first sequence is a fourier transform sequence of a fifth sequence, the second sequence is a fourier transform sequence of a sixth sequence, the fifth sequence and the sixth sequence respectively include M elements, where elements of the fifth sequence and the sixth sequence at the same position are not zero at the same time, and the fifth sequence and the sixth sequence are orthogonal in code division;
the processing module 910 is further configured to perform signal processing on the first received signal and the second received signal.
At the receiving end of the embodiment of the present invention, the two sequences corresponding to the two signals received in one symbol are orthogonal in code division, and elements of the two sequences at the same position are not zero elements at the same time, that is, the PAPR of at least two signals received in one symbol is low.
Optionally, as an embodiment, the fifth sequence is extended by a seventh sequence, the sixth sequence is extended by an eighth sequence, and the seventh sequence and the eighth sequence are orthogonal by code division.
Optionally, as an embodiment, the seventh sequence and the eighth sequence are sequences obtained by performing different cyclic shifts on the same base sequence.
Optionally, as an embodiment, the first sequence is a0,a1,...,aM-1The frequency domain sequence corresponding to the seventh sequence is a third sequence c with the length of K0,c1,...,cK-1The first sequence is expanded by a third sequence, and the second sequence is b0,b1,...,bM-1The frequency domain sequence corresponding to the eighth sequence is a fourth sequence d with the length of K0,d1,...,dK-1Said second sequence is extended by a fourth sequence, wherein M is p × K,
Figure GPA0000252632840000371
i is a variable, i takes on a value of 0, 1., M-1, u and v are each one of 0, 1., p-1, and v is not equal to u.
Optionally, as an embodiment, the fifth sequence f0,f1,...,fM-1Is composed of a seventh sequence h with length K0,h1,...,hK-1Expanded by the seventh sequence h0,h1,...,hK-1In the fifth sequence f0,f1,...,fM-1A medium spacing distribution with p, M ═ p × K, and the fifth sequence f0,f1,...,fM-1Except the K elements h of the seventh sequence0,h1,...,hK-1The other elements are zero elements;
the sixth sequence g0,g1,...,gM-1Is composed of an eighth sequence j of length K0,j1,...,jK-1Expanded by the eighth sequence j0,j1,...,jK-1In the sixth sequence g0,g1,...,gM-1A medium spacing distribution with p, M ═ p × K, and the sixth sequence g0,g1,...,gM-1Dividing K elements j of the eighth sequence0,j1,...,jK-1The other elements than zero elements.
Optionally, as an embodiment, the processing module 920 is further configured to:
performing Fast Fourier Transform (FFT) on the signal, and further obtaining a third received signal corresponding to a ninth sequence, where the ninth sequence is a fourier transform sequence of a tenth sequence, elements of any two time domain sequences in the tenth sequence, the fifth sequence, and the sixth sequence at the same position are not zero elements at the same time, and any two time domain sequences in the fifth sequence, the sixth sequence, and the tenth sequence are orthogonal to each other in terms of code division;
and performing signal processing on the third received signal.
Optionally, as an embodiment, the non-zero elements of the fifth sequence are distributed at equal intervals; and/or
The non-zero elements of the sixth sequence are equally spaced.
Alternatively, as an embodiment, the base sequence is a ZC sequence, a cyclically extended ZC sequence, a truncated ZC sequence, or a reference signal sequence conforming to a standard of a long term evolution LTE system of the third generation partnership project 3 GPP.
Optionally, as an embodiment, the fifth sequence is a sequence obtained by performing Inverse Discrete Fourier Transform (IDFT) on the first sequence; the sixth sequence is obtained by performing IDFT conversion on the second sequence.
Optionally, as an embodiment, the processing module 920 is specifically configured to:
performing Inverse Discrete Fourier Transform (IDFT) on the first received signal to obtain a fifth sequence; and/or
And performing Inverse Discrete Fourier Transform (IDFT) on the second received signal to obtain the sixth sequence.
The following can be implemented using the receiving end 900 of the present invention when only considered from the perspective of the frequency domain.
A receiving module 910, configured to receive signals on M subcarriers distributed at equal intervals, where the M subcarriers are subcarriers on the same time domain symbol;
a processing module 920, configured to perform fast fourier transform FFT on the signal received by the receiving module 910 to obtain a first sequence a0,a1,...,aM-1Corresponding first received signal and second sequence b0,b1,...,bM-1A corresponding second received signal, wherein the first sequence and the second sequence are code division orthogonal, and the first sequence a0,a1,...,aM-1Is composed of a third sequence c with length K0,c1,...,cK-1Extended, the second sequence b0,b1,...,bM-1Is composed of a fourth sequence d of length K0,d1,...,dK-1Expanded, M ═ p × K,
Figure GPA0000252632840000381
i is a variable, i takes on a value of 0, 1., M-1, u and v are each one of 0, 1., p-1, and v is not equal to u,wherein M, p and K are both positive integers;
the processing module 920 is further configured to perform signal processing on the first received signal and the second received signal.
Optionally, as an embodiment, the third sequence c0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure GPA0000252632840000391
r is variable and the value of r is 0,11And α2Is any real number.
Alternatively, the processor may, as an embodiment,
Figure GPA0000252632840000392
wherein λ is1And λ2Each is any one of 0, 1.. and pK-1.
Optionally, as an embodiment, the receiving module 910 is further configured to receive a first signaling, where the first signaling includes first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and α1Receiving a second signaling, wherein the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is related to v and α2And (4) correlating.
Optionally, as an embodiment, the third sequence c0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure GPA0000252632840000393
r is variable and the value of r is 0,11And β2Are 0, 1.And one value of K-1.
Optionally, as an embodiment, the receiving module 910 may further be configured to:
receiving a first signaling, wherein the first signaling comprises first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and β1Correlation;
receiving a second signaling, wherein the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is associated with v and β2And (4) correlating.
Optionally, as an embodiment, the motif sequence is a ZC sequence, a cyclically extended ZC sequence, a truncated ZC sequence, or a reference signal sequence conforming to a standard of a long term evolution LTE system of the third generation partnership project 3 GPP.
It should be noted that, in the embodiment of the present invention, the receiving module 910 may be implemented by a transceiver, and the processing module 920 may be implemented by a processor. As shown in fig. 10, the receiving end 1000 may include a processor 1010, a transceiver 1020, and a memory 1030. Memory 1030 may be used to store, among other things, code executed by processor 1010.
The various components in the receiver 1000 are coupled together by a bus system 1040, wherein the bus system 1040 includes a power bus, a control bus, and a status signal bus in addition to a data bus.
The receiving end 900 shown in fig. 9 or the receiving end 1000 shown in fig. 10 can implement the processes implemented in the embodiments of fig. 1 to fig. 6, and for avoiding repetition, the details are not repeated here.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (30)

1. A method of transmitting a signal, comprising:
the sender will include a first sequence a of M elements0,a1,...,aM-1Mapping to M subcarriers distributed at equal intervals and a second sequence b comprising M elements0,b1,…,bM-1Mapping to the M subcarriers, where the M subcarriers are subcarriers on the same time domain symbol, the first sequence and the second sequence are orthogonal in code division, and the first sequence a0,a1,…,aM-1Is composed of a third sequence c with length K0,c1,…,cK-1Extended, the second sequence b0,b1,…,bM-1Is composed of a fourth sequence d of length K0,d1,...,dK-1Expanded, M ═ p × K,
Figure FDA0002361868350000011
i is a variable, i takes a value of 0,1,., M-1, u and v are respectively one of 0,1,., p-1, and v is not equal to u, wherein M, p and K are positive integers;
the sending end generates sending signals according to the elements on the M subcarriers;
and the sending end sends the sending signal.
2. The method of claim 1, wherein the third sequence c is0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure FDA0002361868350000012
r is variable and the value of r is 0,11And β2One value of 0,1, K-1, respectively.
3. The method of claim 2, further comprising:
the sending end sends a first signaling, where the first signaling includes first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and β1Correlation;
the sending end sends a second signaling, where the second signaling includes second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is associated with v and β2And (4) correlating.
4. The method of claim 1, wherein the third sequence c is0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure FDA0002361868350000013
r is variable and the value of r is 0,11And α2Is any real number.
5. The method of claim 4, wherein the step of removing the metal oxide layer comprises removing the metal oxide layer from the metal oxide layerIn this way, the first and second electrodes can be brought into contact with each other,
Figure FDA0002361868350000014
wherein λ is1And λ2Each is any one of 0, 1.. and pK-1.
6. The method according to claim 4 or 5, characterized in that the method further comprises:
the sending end sends a first signaling, where the first signaling includes first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and α1Correlation;
the sending end sends a second signaling, where the second signaling includes second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is associated with v and α2And (4) correlating.
7. The method according to any one of claims 1 to 5, wherein the transmitting end generates a transmission signal according to the elements on the M subcarriers, including:
and the sending end bears the information to be transmitted on the M subcarriers, and elements which bear the information to be transmitted on the M subcarriers are converted to a time domain to generate a sending signal.
8. The method according to any of claims 2 to 5, wherein the motif sequence is a ZC sequence, a cyclically extended sequence of a ZC sequence, a truncated sequence of a ZC sequence or a reference signal sequence according to a standard of the Long term evolution, LTE, system of the third Generation partnership project, 3 GPP.
9. A method of transmitting a signal, comprising:
a receiving end receives signals on M subcarriers distributed at equal intervals, wherein the M subcarriers are subcarriers on the same time domain symbol;
the receiving end carries out Fast Fourier Transform (FFT) on the signal to obtain a first signalSequence a0,a1,...,aM-1Corresponding first received signal and second sequence b0,b1,...,bM-1A corresponding second received signal, wherein the first sequence and the second sequence are code division orthogonal, and the first sequence a0,a1,...,aM-1Is composed of a third sequence c with length K0,c1,...,cK-1Extended, the second sequence b0,b1,...,bM-1Is composed of a fourth sequence d of length K0,d1,...,dK-1Expanded, M ═ p × K,
Figure FDA0002361868350000021
i is a variable, i takes a value of 0,1,., M-1, u and v are respectively one of 0,1,., p-1, and v is not equal to u, wherein M, p and K are positive integers;
and the receiving end processes the first receiving signal and the second receiving signal.
10. The method of claim 9, wherein the third sequence c is0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure FDA0002361868350000022
r is variable and the value of r is 0,11And β2One value of 0,1, K-1, respectively.
11. The method of claim 10, further comprising:
the receiving end receives a first signaling, where the first signaling includes first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and β1Correlation;
the receiving end receives a second signaling, where the second signaling includes second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is associated with v and β2And (4) correlating.
12. The method of claim 9, wherein the third sequence c is0,c1,...,cK-1And said fourth sequence d0,d1,…,dK-1Are the same base sequence x0,x1,…,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure FDA0002361868350000023
r is variable and the value of r is 0,11And α2Is any real number.
13. The method of claim 12,
Figure FDA0002361868350000024
wherein λ is1And λ2Each is any one of 0, 1.. and pK-1.
14. The method according to claim 12 or 13, characterized in that the method further comprises:
the receiving end receives a first signaling, where the first signaling includes first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and α1Correlation;
the receiving end receives a second signaling, where the second signaling includes second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is associated with v and α2And (4) correlating.
15. The method according to any of claims 10 to 13, wherein the motif sequence is a ZC sequence, a cyclically extended ZC sequence, a truncated ZC sequence or a reference signal sequence according to the standards of the long term evolution, LTE, system of the third generation partnership project, 3 GPP.
16. A transmitting end, comprising:
a processing module for converting a first sequence a comprising M elements0,a1,…,aM-1Mapping to M subcarriers distributed at equal intervals and a second sequence b comprising M elements0,b1,…,bM-1Mapping to the M subcarriers, where the M subcarriers are subcarriers on the same time domain symbol, the first sequence and the second sequence are orthogonal in code division, and the first sequence a0,a1,...,aM-1Is composed of a third sequence c with length K0,c1,...,cK-1Extended, the second sequence b0,b1,...,bM-1Is composed of a fourth sequence d of length K0,d1,...,dK-1Expanded, M ═ p × K,
Figure FDA0002361868350000031
i is a variable, i takes a value of 0,1,., M-1, u and v are respectively one of 0,1,., p-1, and v is not equal to u, wherein M, p and K are positive integers;
the processing module is further configured to generate a transmission signal according to the elements on the M subcarriers;
and the sending module is used for sending the sending signal generated by the processing module.
17. The transmitting end according to claim 16, characterized in that the third sequence c0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure FDA0002361868350000032
r is a variable, and r is a variable,r is 0, 1.., K-1, β1And β2One value of 0,1, K-1, respectively.
18. The transmitting end of claim 17, wherein the transmitting module is further configured to:
sending a first signaling, wherein the first signaling comprises first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and β1Correlation;
sending a second signaling, wherein the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is associated with v and β2And (4) correlating.
19. The transmitting end according to claim 16, characterized in that the third sequence c0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure FDA0002361868350000033
r is variable and the value of r is 0,11And α2Is any real number.
20. The transmitting end according to claim 19,
Figure FDA0002361868350000034
wherein λ is1And λ2Each is any one of 0, 1.. and pK-1.
21. The transmitting end according to claim 19 or 20, wherein the transmitting module is further configured to:
sending a first signaling, wherein the first signaling comprises first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and α1Correlation;
sending a second signaling, wherein the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is associated with v and α2And (4) correlating.
22. The transmitting end according to any of claims 16 to 20, wherein the processing module generates the transmission signal according to the elements on the M subcarriers, and comprises:
and bearing the information to be transmitted on the M subcarriers, and transforming elements bearing the information to be transmitted on the M subcarriers to a time domain to generate a sending signal.
23. Transmitting end according to any of claims 17 to 20, characterized in that the motif sequence is a ZC sequence, a cyclically extended ZC sequence, a truncated ZC sequence or a reference signal sequence according to the standards of the long term evolution, LTE, system of the third generation partnership project, 3 GPP.
24. A receiving end, comprising:
a receiving module, configured to receive signals on M subcarriers distributed at equal intervals, where the M subcarriers are subcarriers on the same time domain symbol;
a processing module, configured to perform Fast Fourier Transform (FFT) on the signal received by the receiving module to obtain a first sequence a0,a1,...,aM-1Corresponding first received signal and second sequence
b0,b1,...,bM-1A corresponding second received signal, wherein the first sequence and the second sequence are code division orthogonal, and the first sequence a0,a1,...,aM-1Is composed of a third sequence c with length K0,c1,...,cK-1Extended, the second sequence b0,b1,...,bM-1Is composed of a fourth sequence d of length K0,d1,...,dK-1Expanded, M ═ p × K,
Figure FDA0002361868350000041
i is a variable, i takes a value of 0,1,., M-1, u and v are respectively one of 0,1,., p-1, and v is not equal to u, wherein M, p and K are positive integers;
the processing module is further configured to perform signal processing on the first received signal and the second received signal.
25. The receiver according to claim 24, wherein the third sequence c is a sequence of sequences0,c1,...,cK-1And said fourth sequence d0,d1,...,dK-1Are the same base sequence x0,x1,...,xK-1And performing cyclic shift to obtain a sequence, wherein,
Figure FDA0002361868350000042
r is variable and the value of r is 0,11And β2One value of 0,1, K-1, respectively.
26. The receiving end of claim 25, wherein the receiving module is further configured to:
receiving a first signaling, wherein the first signaling comprises first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and β1Correlation;
receiving a second signaling, wherein the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is associated with v and β2And (4) correlating.
27. The receiver according to claim 24, wherein the third sequence c is a sequence of sequences0,c1,...,cK-1And said fourth sequence d0,d1,…,dK-1Are the same base sequence x0,x1,…,xK-1After cyclic shiftThe resulting sequence, wherein,
Figure FDA0002361868350000043
r is variable and the value of r is 0,11And α2Is any real number.
28. The receiving end according to claim 27,
Figure FDA0002361868350000044
wherein λ is1And λ2Each is any one of 0, 1.. and pK-1.
29. The receiving end according to claim 27 or 28, wherein the receiving module is further configured to:
receiving a first signaling, wherein the first signaling comprises first cyclic shift parameter information of the first sequence, and the first cyclic shift parameter information is associated with u and α1Correlation;
receiving a second signaling, wherein the second signaling comprises second cyclic shift parameter information of the second sequence, and the second cyclic shift parameter information is associated with v and α2And (4) correlating.
30. The receiving end according to any of claims 25 to 28, wherein the motif sequence is a ZC sequence, a cyclically extended ZC sequence, a truncated ZC sequence or a reference signal sequence conforming to the standards of the long term evolution, LTE, system of the third generation partnership project, 3 GPP.
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